chore(rebar): Pier_T_rebar 작업 폴더 초기 구성 및 외부 의존 파일 통합

- Code\rebar_pipeline, review_pipeline, pier-program을 정션에서 실제 폴더로 전환
- Code\rhino_mcp 및 CLAUDE_rhino배경.md 추가, .mcp.json은 PYTHONPATH로 새 위치 사용
- pier-program 내부 .git 제거(이력은 backup\pier-program_20261028.bundle에 보관)
- worktree 가이드 반영(CLAUDE.local.md, HANDOFF.md)
- D:\Rhino-MCP 경로 참조를 새 위치로 치환

Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>

Code/교각모델링앱/engine/rhino/checks/_common.py

@@ -0,0 +1,62 @@
+"""Shared helpers for the gate checkers (imported inside Rhino 8).
+
+Checkers read only EXPECTED_PATH (independent drawing values) and never the generator params.
+"""
+import json
+
+from Rhino.DocObjects import ObjectEnumeratorSettings
+
+
+def load_expected(path):
+    return json.load(open(path, encoding="utf-8"))
+
+
+def all_objects(doc):
+    """All live objects incl. hidden/locked (doc.Objects alone skips hidden ones)."""
+    s = ObjectEnumeratorSettings()
+    s.HiddenObjects = True
+    s.LockedObjects = True
+    return list(doc.Objects.GetObjectList(s))
+
+
+def chain(spec, base=0.0):
+    """Expand a dimension chain: start offsets (cumulative) then groups [[n, pitch], ...] from the last point."""
+    pts, z = [], base
+    for s in spec["start"]:
+        z += s
+    pts.append(z)
+    for n, p in spec["groups"]:
+        for _ in range(n):
+            z += p
+            pts.append(z)
+    return pts
+
+
+def series(spec):
+    """Expand {start, pitch, n} (or a literal list) into a list of values."""
+    if isinstance(spec, list):
+        return list(spec)
+    return [spec["start"] + spec["pitch"] * i for i in range(spec["n"])]
+
+
+def row(spec):
+    """Bar positions: two end bars plus a regular series."""
+    return sorted(list(spec["ends"]) + series(spec))
+
+
+def ychain(spec, half):
+    """Section chain measured from the -Y face: listed first bars (absolute), then n x pitch from the last of
+    them, then the last bar at `end`; returned relative to the section centre (minus `half`)."""
+    pts = list(spec["start"])
+    pts += [pts[-1] + spec["pitch"] * k for k in range(1, spec["n"] + 1)] + [spec["end"]]
+    return [y - half for y in sorted(pts)]
+
+
+def write_result(path, results, extra=None):
+    summ = dict(total=len([r for r in results if r["result"] != "INFO"]),
+                passed=sum(r["result"] == "PASS" for r in results),
+                failed=sum(r["result"] == "FAIL" for r in results))
+    summ.update(extra or {})
+    json.dump(dict(summary=summ, results=results), open(path, "w", encoding="utf-8"), ensure_ascii=False, indent=1)
+    print(json.dumps(summ, ensure_ascii=False))
+    return summ